Potential capacity of Vezuviy, Andromeda and Snihova Koroleva rape intense hybrids towards developing seed productivity subjects to terms of sowing and use of high concentration suspension ...micro-fertilizers of Vuksal-Terios, Microplant, Ascofol by way of pre-sowing seed treatment and foliar application.
The estimated minimum standard length (SL) to attain sexual maturity in largemouth bass, Micropterus salmoides, in Japan, is 230 mm. We observed the gonadal development of smaller largemouth bass ...(two males, 162-169 mm SL; two females, 182-204 mm SL) captured in an artificial pond located at the University of Shiga Prefecture. This study and two previous reports suggest that largemouth bass can mature at smaller sizes than previously reported. Maturity with smaller body size may be related to genetic exchange with other smaller geographic subspecies and environmental factors, such as the amount of food and water temperature.
The emergence and early developments of life are considered from the point of view that contingent events that inevitably marked evolution were accompanied by deterministic driving forces governing ...the selection between different alternatives. Accordingly, potential energy sources are considered for their propensity to induce self-organization within the scope of the chemical approach to the origin of life. Requirements in terms of quality of energy locate thermal or photochemical activation in the atmosphere as highly likely processes for the formation of activated low-molecular weight organic compounds prone to induce biomolecular self-organization through their ability to deliver quanta of energy matching the needs of early biochemical pathways or the reproduction of self-replicating entities. These lines of reasoning suggest the existence of a direct connection between the free energy content of intermediates of early pathways and the quanta of energy delivered by available sources of energy.
To investigate the characteristics of hybrid eggs and larva produced by olive flounder Paralichthys olivaceus females and starry flounder Platichthys stellatus males, we examined the developmental ...speed of hybrid eggs at different water temperatures. The developmental speed of hybrid eggs tended to increase with increasing water temperature. Specifically, the hatching times were 91 hrs, 62 hrs and 43 hrs at 10℃, 15℃and 20℃, respectively. The mean bio-logical minimum temperature of the hybrid was 1.3℃, which is in between that of the olive flounder and the starry flounder. In high water temperatureseasons, slower growth was observed in hybrids of the starry flounder which is a coldwater fish.
Neonates of the rotifer Brachionus plicatilis were exposed to 3, 6, 9 and 12 hours' starvation after hatch, and evaluated the effects on survival rate, life-history parameters, biological minimum ...size and egg size under the provision of Chlorella as food. Short-period starvation for 3-12 hours induced the decline of survival rate and the reduction in biological minimum size. In addition to those phenomena, the delay of the first spawning was observed proportionally to the starvation period, which implies that the development of a reproductive organ was induced by the commencement of feeding. In spite of the proportional reduction in biological minimum size, egg size had no relation to the starvation period, which shows that somatic growth and egg formation were regulated independently in the rotifer. Even it is short starvation should be avoided in mass culture of the rotifer in order to prevent both reduction in animal size and survival rate.
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